diff --git a/libc/kernel/uapi/linux/v4l2-controls.h b/libc/kernel/uapi/linux/v4l2-controls.h
index 23158dc..f6ef26c 100644
--- a/libc/kernel/uapi/linux/v4l2-controls.h
+++ b/libc/kernel/uapi/linux/v4l2-controls.h
@@ -714,6 +714,7 @@
   V4L2_MPEG_VIDEO_AV1_LEVEL_7_2 = 22,
   V4L2_MPEG_VIDEO_AV1_LEVEL_7_3 = 23
 };
+#define V4L2_CID_MPEG_VIDEO_AVERAGE_QP (V4L2_CID_CODEC_BASE + 657)
 #define V4L2_CID_CODEC_CX2341X_BASE (V4L2_CTRL_CLASS_CODEC | 0x1000)
 #define V4L2_CID_MPEG_CX2341X_VIDEO_SPATIAL_FILTER_MODE (V4L2_CID_CODEC_CX2341X_BASE + 0)
 enum v4l2_mpeg_cx2341x_video_spatial_filter_mode {